A pre-emergence residual herbicide for broadleaf weed control can now be applied in field beans and combining peas.

The authorisation for Emerger (aclonifen) will be a welcomed addition given the low number of pre-em herbicides currently available for these crops, says Bayer’s Richard Phillips.

“As the only aclonifen product on the market, the authorisation for Emerger in peas and beans means growers have access to a herbicide with a broad-spectrum of activity. Its novel mode of action – HRAC group 32 – will also support efforts to promote resistance management,” he explains.

Weed species

Of the broadleaf weeds, Emerger offers activity on fat hen, redshank, black bindweed, mayweeds, charlock, chickweed and poppy, as well as moderate control of blackgrass (from seed).

“Emerger is primarily absorbed by the shoot of germinating weeds, this is advantageous in dry weather conditions such as those that typically occur in the spring when seeking to establish spring crops,” says Richard.

Tank mixing

To promote all-round weed control and protect efficacy, Bayer will support Emerger in mixes with one other herbicide providing the minimum application rates are observed (see table).

“It’s prudent to ensure Emerger is partnered with a product belonging to another mode of action group to support effective control and to protect efficacy. Depending on the crop and the weed spectrum to be managed, we’ve identified those products and inclusion rates that give growers the greatest means possible of achieving the control they desire,” comments Richard.

He says growers are to be aware that the authorisation doesn’t include vining peas.

Emerger tank-mix compatibility for peas and beans (spring 2024)*

Product Active substance
Nirvana imazamox+ pendimethalin
Anthem pendimethalin
Stomp Aqua pendimethalin
Centium 300 CS clomazone
Sirtaki CS clomazone
Stallion Sync Tec clomazone+ pendimethalin
Defy prosulfocarb
Dual Gold S-metolachlor

*= Bayer supports the physical compatibility of Emerger tank mixes with one other herbicide subject to authorised use in relevant crop